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In resistance-based rotor temperature estimation schemes, a rotor temperature is derived from a resistance quantity based on an induction motor equivalent circuit model. This temperature is susceptible to fluctuations in the motor's supply frequency. In this paper, a complex adaptive phase discriminator is proposed to track supply frequency fluctuations for grid-connected induction motors. A frequency-selective...
In this paper, a detailed study of the performance of rotor flux and reactive power based MRAS rotor resistance estimators for Vector Controlled Induction Motor drive is presented. The rotor resistance changes significantly during operation of the drive due to temperature rise and saturation. This variation has a major influence on the performance of the field oriented control of induction motor drive...
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